Attachment for hot-air registers



(No Model.)

, v 1:". O. CARROLL.

ATTACHMENT FOR HOT AIR REGISTERS. No. 549,897. Patented Nov. '19, 1895.

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UNITED STATES PATENT OFFICE.

FRANCIS O. CARROLL, OF PEORIA, ILLINOIS.

ATTACHMENT FOR HOT-AIR REGISTERS.

SPECIFICATION forming part of Letters Patent No. 549,897, dated November 19, 1895. Application filed May 15, 1895. gerial No. 549,342. (No model.)

To all whom, it may concern.- 7

Be it known that I, FRANCIS O. CARROLL, a citizen of the United States, residing at Peoria, in the county of Peoria and State of Illinois,have invented certain new and useful Improvements in Attachments for Hot-Air Registers; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to a supplemental'register by means of which a device is providedthat will effectually prevent the interruption of the steady flow of a current of hot air from a duct or flue.

My invention relates more particularly to a register or hood to be used with hot-air furnaces and to be placed within or over registeropenings in the various apartments of the building which is heated by such currents, with a view of maintaining a steady flow uninterruptedly of the full volume of hot air from the pipes leading to said register-open ings and from said register-openings.

That my invention may be more fully understood,reference is had to the accompanying drawings, in which Figure 1 is a plan view of my suplemental register. Fig. 2 is a section through the line was of Fig. 1. Fig. 3 is a section through the line y y of Fig. 1.

In the figures, A refers to a substantial rectangularly-formed frame, which in my device constitutes the base of my supplemental re ister or cap, this base being designed to bear over the register-openin g into a room and from the heat-pipe connected with afurnace. cm are perforated extensions from the inner faces thereof, and a a are flanges bearing outwardly from the lower edge of said base and provide afooting therefor.

B is a frame open in the manner shown in the drawings, and is provided with the depending flange 1), bearing over the upper edge of the base A, and is secured thereto by means of the bolts 12, substantially in the manner shown in Fig. 2 of the drawings.

The dotted lines on Figs. 2 and 3 merely show the relative locations of the usual attachments to registers for interrupting or causing the flow of air therefrom, the reach G being connected with an adjustable part of said mechanism at one extremity and the other extremity thereof bearing without my supplemental register or cap, and, being provided with the handle g, accommodates the shifting or adjusting of the said parts; but any suitable means may be provided for this pur pose.

F is a fan which may be constructed substantially in the manner shown in the drawings, and is journaled upon the verticallycarried rod D, which said rod is supported in connection with the cross-piece E, which bears across the register-opening, and said fan being adapted to revolve freely upon said rod D.

O is a rod bearing through in the top of the supplemental register or cap and provided with a hook at its lower extremity, which is designed to engage the lower surface of the usual register to hold the said cap firmly in connection with the register-opening and may be turned freely from side to side for the purpose of engaging or releasing the same.

My device is provided to overcome one of the most serious difficulties to the successful operation of hot-air furnacesnamely, the maintenance of a continuous, full, and uninterrupted flow of hot air from the pipes leading from said furnace through the registeropening and into the apartments of the building designed to be heated. It is of course an accepted fact that cold air is heavier than the same volume of hot air, so that in the room the cold air therein would tend naturally toward and occupy the lower portion of the apartment and the hot air would tend toward and occupy the upper portion of the room.

Hot air entering a room, without regard to the condition or temperature thereof, will rise to the upper portion of the same and cold air entering a room-which would be the case with any room to a greater or less extent that is provided with doors and windows and the atmosphere without being at a low temperature, so that such cold air entering a room will bear closely to the floor thereof and will seek to establish a current through said room, and it is universally the case that the outlet for said current is through the registeropening and heat-pipe from the furnace, unless the volume of heat therefrom is sufliciently large to heat the smaller volume of cold air, and in such case the establishment of a current from. the room through the register-opening and heat-pipe will be interrupted; but ordinarily the volume of heat is not sufficient and a current is established downward through the register-opening, which said current will occupy a portion of the capacity of the flue and will cut off the volume of heat arising therefrom, and besides will modify or reduce the temperature thereof, so that when it passes the register-opening it is substantially cold air. This is an established fact, and is admitted to be the most serious difficulty attendant on the use of hot-air furnaces. My device is provided expressly to overcome this diliiculty. In the first place I provide the base A, which stands some distance above the floor of the room, so that the currents of air tending toward the register-opening and close to the floor will strike the sides thereof and will be deflected upwardly, and in a great many cases this provision alone, in connection with the register-openingthat is, of the base of my supplementary register-would suffice to interrupt the establishment of the current of cold air down through the flue, as the air striking the side would be deflected upwardly and the temperature thereof would be quickly modified, so that its tendency to gravitate would be converted into a tendency to rise; but by the provision of the fan F, I am e11- abled to completely prevent the establishment of any current of cold air down the registen opening, no matter what the circumstances may be or the temperature of the room or the extent of the cold air-current. I presume, in the carrying out of this theory, of course, that there is in the furnace sufficient fire to generate and maintain a continuous and strong volume of hot air through the various heat-fines. This being the case, the heat arising through the register-opening will cause the fan F to be revolved rapidly and with coi1- siderable momentum. The current of cold air striking the base A and being deflected upwardly will bear toward the fan as it is shown located in the drawings, and in some cases, if the fan were not provided, a current would be established down and through the registeropening; but by the provision of the fan the movement and momentum thereof occasioned by the contact therewith of the current of hot air will cause the cold air to be dissipated and scattered at this point in such a manner as to effectually prevent any downward tendency thereof to establish a current and in this manner insure the maintenance of a continuous flow of the full volume of heat from the heatpipe,whieh will insure, by the pro vision of 1]] y supplemental register and fan attachment, the maintenance of at least ten. per cent. higher temperature within the room than can be maintained from the same fire without the use of my register.

I do not claim that more than the usual volume of heat is induced from the furnace, which would result in taking from the other flues their legitimate portion of the heat from the furnace, and even if but one of my registers were used it would not affect the operation or supply of heat from the other heat pipes in the building, as they would operate the same as though the ordinary registers were used in every room; but by using my supplemental register in connection with all the heat-pipes the same result would be obtained in each and every room-that is, to raise the temperature thereof and without any extra supply of fire in the furnace.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is

In a radiator attachment, the combination of a frame A, a frame 13 provided with open work and mounted on and supported by the first mentioned frame, a supporting bar arranged across the lower frame, a fan shaft projeetin g upwardly into the chamber formed by the casings, the shaft being sustained by the supporting bar, a fan mounted on and adapted to rotate around the shaft, an d means for fastening the attachment to the register, substantially as shown.

In testimony whereof I affix my signature in presence of two witnesses.

FRANCIS C. ARROlQL. Witnesses:

W. INMAN, 1: JOHN J. CHOWDER. 

